Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Ronald D. Jones"'
Publikováno v:
Marine Ecology Progress Series. 514:35-41
Autor:
Nathan J. P. Wintle, Deborah A. Duffield, Nélio B. Barros Deceased, Ronald D. Jones, James M. Rice
Publikováno v:
Marine Mammal Science. 27:E268-E278
Muscle samples from 105 marine mammals stranded along the Oregon and Washington coasts (2002–2009) were tested for levels of total mercury (THg) by Cold Vapor Atomic Fluorescence Spectrometry. The THg present is in the form of the highly toxic meth
Autor:
Jennifer H. Richards, Daniel L. Childers, Leonard J. Scinto, Joel C. Trexler, Ronald D. Jones, Evelyn E. Gaiser
Publikováno v:
Limnology and Oceanography. 51:617-630
We examined periphyton along transects in five Everglades marshes and related compositional and functional aspects to phosphorus (P) gradients caused by enriched inflows. Results were compared to those of a P-addition experiment in a pristine Evergla
Autor:
David W. Lee, Joel C. Trexler, Jennifer H. Richards, Evelyn E. Gaiser, Daniel L. Childers, Krish Jayachandran, Ronald D. Jones, Leonard J. Scinto, Adrienne L. Edwards, Gregory B. Noe
Publikováno v:
Journal of Environmental Quality. 34:717-723
Few studies have examined long-term ecological effects of sustained low-level nutrient enhancement on wetland biota. To determine sustained effects of phosphorus (P) addition on Everglades marshes we added P at low levels (5, 15, and 30 microg L(-1)
Autor:
Ronald D. Jones, Susan K. Dailey, Norman M. Scully, Rudolf Jaffé, Joseph N. Boyer, Nagamitsu Maie
Publikováno v:
Limnology and Oceanography. 49:1667-1678
We studied the role of photochemical and microbial processes in contributing to the transformation of dissolved organic matter (DOM) derived from various plants that dominate the Florida Everglades. Plant-derived DOM leachate samples were exposed to
Autor:
Jennifer H. Richards, Joel C. Trexler, Krishnaswamy Jayachandran, Evelyn E. Gaiser, Ronald D. Jones, Leonard J. Scinto, Daniel L. Childers
Publikováno v:
Water Research. 38:507-516
Growing concern over the ecological consequence of phosphorus (P) enrichment in freshwater wetlands has elicited considerable debate over the concentration of water column P associated with eutrophication. In the oligotrophic Everglades, the displace
Publikováno v:
FEMS Microbiology Ecology. 47:191-206
Direct evidence for autotrophic ammonia oxidation is documented for the first time in a deep-sea hydrothermal plume. Elevated NH(4) (+) concentrations of up to 341+/-136 nM were recorded in the plume core at Main Endeavour Field, Juan de Fuca Ridge.
Publikováno v:
Freshwater Biology. 48:1993-2008
SUMMARY 1. Our goal was to quantify short-term phosphorus (P) partitioning and identify the ecosystem components important to P cycling in wetland ecosystems. To do this, we added P radiotracer to oligotrophic, P-limited Everglades marshes. 32 PO4 wa
Autor:
Ronald D. Jones, Leonard J. Scinto, Miroslav Gantar, Aga Pinowska, Evelyn E. Gaiser, Serge Thomas
Publikováno v:
Lake and Reservoir Management. 18:324-330
The Florida Everglades is a fragile wetland system that is naturally depleted in phosphorus (P). This hydrosystem has been heavily impacted by human activities, including the draining of wetlands to provide water for agricultural and urban use. The r
Autor:
Jennifer H. Richards, John F. Meeder, David W. Lee, Evelyn E. Gaiser, Gregory B. Noe, Adreienne L. Edwards, Joel C. Trexler, Krish Jayachandran, Leonard J. Scinto, Ronald D. Jones, Daniel L. Childers
Publikováno v:
Biogeochemistry. 59:239-267
Natural, unenriched Evergladeswetlands are known to be limited by phosphorus(P) and responsive to P enrichment. However,whole-ecosystem evaluations of experimental Padditions are rare in Everglades or otherwetlands. We tested the response of theEverg